Portable base-burning boiler



(No Model.) 3 Sheets-Sheet 1.

A. H. FOWLBR.

PORTABLE BASE BURNING BUILBB.

N0. 271,621. Patented Feb.6,1883. I

il g;

/l1 lli-.m1 l! I' A. will u LE' E N. PETERS. Phelnllumgmpher. wnshmgwn. D. C.

3 Sheets Sheet 2.

(No Model.)

A. H. FOWLBR.

BOBTABLB BASE BURNING BOILBB.A

Patented Feb. 6,

NA PETERS. Pholo-Liihugrnplwr. Washington. Dv C.

(No Model.) y 3 SheetsSheet 3. A. H. FO'WLER, PORTABLE BASE BURNING BOILBR. No. 271,621-I Panented Feb-6,1883.

@aureo FS'ra'rns l Parenti* Ormea.

ARTHUR H. FOVLER, OF NEVVA'RK, OHIO.

PORTABLE BASE-BURNING BOILER.

SPECIFICATION forming part of Letters Patent No. 271,621, dated February 6, .1853.

Application filed March 1, 1882.

.To all whom t may concern:

Be it known that I, ARTHUR H. FoWLER, of Newark, in the county ot' Licking and State of Ohio, have invented a new and useful Improvement in Portable Base-Burning Boilers; and I do hereby declare that the following is a full, clear, and exact description ot' the same.

My invention relates to base-burning boilers of that class which are constiucted of iron without any briclgl-work.

The invention consists in certain details ot' construction, the object ot' which is to vsimplify the boiler and to increase its capacity and durability. These dela-ils are hereinafter fully described, and specifically indicated in the claim.

ln the accompanyingdrawings,Figure 1 represents a vertical central section ot lnyiinproved boiler. Fig. 2 is a transverse section onv line x x ot' Fig. 1. Figs. 3 and t represent modiiications ot the boiler.

In these drawings the lower and main part ofthe boiler is composed ot' a double wall, a a, which wall incloses an annular water-space and surrounds the tire-chamber. This annular boiler is i'ormed, as shown in Fig. l, ot' plain annular walls, with annular heads substatiiially channel-iron form in cross-section, the-st` heads being inserted between the walls a et and bolted or riveted thereto both at the upper and lower ends. rThis annular part ofthe boiler, cylindrical in form, rests upon a castiron annular base, also shown in Fig. l. The base is cast with an inner iiange, I), about which the cylindrical boiler rests, the upper edge of which supports the grate. W'ithiti this hase is a nearly-annular smoke-chamber, interrupted only by the space excluded by transverse walls to form the ash-door, and opposite the ash-door is represented an exit for the smoke. The annular chamber is provided with smokellues A A, which pass through the heads and open above into the annular space connected with the interior tire-space and below into the annuiar smoke-chamber in the base.

The upper and interior part of the boiler is composed of ajseparate section, (marked B.) This consists of an upper cylindrical part, c, and a lower conical part, el, throughout the whole extent of which is a cylindrical magazine for the coal. The walls of the section B,

(No model.)

both within and without, are of boiler-iron,se

cal boiler is formed by a special construction,

consisting` ofa ring, K, which is U-shaped in cross-section, placed within and bolted to the edges of the conical-boiler section, in the manner shown in Fig. l. This U-shaped ring may be formed of cast-steel or any other suitable material capable ot' resisting the action of the greater heat to which it is exposed. The construction also brings the riveted joints at a distance from the hottest ofthe tire.`

About the upper part of the conical portion ot' the boiler is a smoke-belt, which includes the upper end of the annular sect'on, and opens into the interior ofthe tire-chamber by an annular space between the conical part ot' the boiler and the upper end of the lower section. This is covered in part by solid sheet metal, riveted to the cylindrical part of the upper section and resting upon the outer edge ot' the upper end ot' the cylindrical part, thus aiding inv supporting` the upper part upon the lower.

In part this belt is closed by covers d', provided with handles, and removable at pleasure for the purpose ot' cleaning the inside of the boiler or the smoke-tubes. The upper section ot' the boiler is connected to the lower by means ot' pipes E, as shown in Fig. l.

The tire-door is formed ot' a casting of proper size, and the walls are riveted thereto. The ash-door (shown at g) is through the base, being provided with'side walls, which close the ends of the nearly-annularsmoke-space in the base, the ash-door forming an interruption of this space. The grate is'` made to rest upon the llanges b b ofthe base.

.When soft coal is 'to be burned, I provide the magazine with a sleeve, H, having flange h, adapted to rest upon the rim of the magazine. This is made a tritle smaller than the magazine, so as to leave space of about onefourth of an inch between its outer walls and the inner walls of the magazine. The sleeve is made slightly tapering from the lower end upward to permit the coal to fall freely, and provided with holes about haltinch in diameter to allow the gases to escapefrom the sleeve into the annular space, whence they pass downward ICQ into the fire. It wiilbe understood that the coal is held within a tapering sleeve. The flange is to tit tight to the tiange of the magazine, and the sleeve is to be provided with a suitable cover. In Figlhave shown an addition to this modification ofthe boiler, in which the lower annular partis provided with two sets ot'tuhes, the inner being the downward tubes and the outer the up tubes. The inner, which are marked fn, conduct the products of combustion into the annular smoke-space in the base, whence they pass through the outer tubes, m, into the smoke-belt, heretofore described, at the uppex` end ofthe annular-section.v In this nioditicaton, however, a wall, o, separates the inner side ot' the smoke-belt from the interior ot' the lire-chamber, and this wall 0 separates the inner and outer rows oftubes. The smokeoutlet in this case is represented at M, and is from the vsmoke-belt. The pipe-connections are the same. The tubes in this form, as in that first described, extend throughout the annular lower section, excepting in that part occupied by the [ire and ash doors.

The construction of the conical section protects the magazine from the fire, leaving ample space for the escape of the products Ofcom` bustion, which by the smoke-tubes are passed over sui'aces in contact with the water, and

give up nearly all their heat before reaching the atmosphere.

Fis a shell of sheet metal placed in the conical water-jacket, resting on lugs in the walls of the same. 1t is intended to assist the circulation of the water in the chamber by separating the cooler water from that exposed to the heat from the smoke-space, and thus cause a v space between the two sections, having removable lids or covers, for the purpose set forth, and the circulating-pipes connecting the inner and outer water-spaces, all substantially as described.

In testimony whereof I have signed my name to this spectication in the presence of two subscribing witnesses.

ARTHUR H. FOWLER.

Witnesses:

J. W. LATIMER, GHAs. H. FoLLET'r. 

